12 Field Museum or Natural History — Zoology, Vol. XL 



Upper view of skull of a Wolf. 



a, Interparietal; b, sagittal crest; c, parietal; d, zygomatic process of squamosal; e, nasal; 

 h, zygoma or zygomatic arch; i, frontal; j, postorbital process of frontal; k, malar or jugal (the post- 

 orbital process of the jugal is shown but not lettered) ; o, maxilla or maxillary bone; p, premaxilla. 



Under view of skull of a Wolf. 



a, Supraoccipital ; b, foramen magnum; c, paraoccipital process; d, zygomatic process of squa- 

 mosal; e, occipital condyle; f, mastoid process; g, auditory bulla; h, zygoma or zygomatic arch; 

 i, basi-occipital; j, postorbital process of the frontal (the corresponding process of the jugal or malar 

 bone opposite to it is known as the postorbital process of the malar) ; k, malar or jugal; 1, postglenoid 

 process; m. pterygoid process; n, presphenoid; o, palatine; p, premaxilla; q, incisors; r, anterior 

 palatine foramina; s, under portions of maxillary bones. 



